Add isSingleComponent bool to getConstantColorComponent

src/effects/SkMagnifierImageFilter.cpp

Index: src/effects/SkMagnifierImageFilter.cpp
diff --git a/src/effects/SkMagnifierImageFilter.cpp b/src/effects/SkMagnifierImageFilter.cpp
index 9d7b9183655bc09cbd1c471fe338a1ac06c04e3f..d6a8e783b90981b10a9cfed341270dca7719dcc5 100644
--- a/src/effects/SkMagnifierImageFilter.cpp
+++ b/src/effects/SkMagnifierImageFilter.cpp
@@ -47,8 +47,6 @@ public:
     static const char* Name() { return "Magnifier"; }
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     float x_offset() const { return fXOffset; }
     float y_offset() const { return fYOffset; }
     float x_inv_zoom() const { return fXInvZoom; }
@@ -76,6 +74,8 @@ private:
 
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
+
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     float fXOffset;
@@ -227,8 +227,9 @@ bool GrMagnifierEffect::onIsEqual(const GrProcessor& sBase) const {
             this->fYInvInset == s.fYInvInset);
 }
 
-void GrMagnifierEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
-    this->updateConstantColorComponentsForModulation(color, validFlags);
+void GrMagnifierEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
+    this->updateInvariantOutputForModulation(inout);
+    inout->fIsSingleComponent = false;
 }
 
 #endif